CN102794608A - Anti-vibration strip component of steam generator of AP1000 nuclear power unit - Google Patents
Anti-vibration strip component of steam generator of AP1000 nuclear power unit Download PDFInfo
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- CN102794608A CN102794608A CN2012102970662A CN201210297066A CN102794608A CN 102794608 A CN102794608 A CN 102794608A CN 2012102970662 A CN2012102970662 A CN 2012102970662A CN 201210297066 A CN201210297066 A CN 201210297066A CN 102794608 A CN102794608 A CN 102794608A
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- end cap
- antivibration
- antivibration bar
- temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D1/00—Details of nuclear power plant
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses an anti-vibration strip component of a steam generator of an AP1000 nuclear power unit. The anti-vibration strip component comprises a V-shaped anti-vibration strip and two end caps respectively arranged on both ends of the anti-vibration strip, wherein the anti-vibration strip is made of a 405 stainless steel material, and the end caps are made from a 609 nickel-based alloy material. A preparation method for preparing the anti-vibration strip component comprises the following steps of: preparing the anti-vibration strip, preparing the end caps, bending, assembly the end caps, heading, checking, cleaning and packaging. According to the anti-vibration strip component of the steam generator of the AP1000 nuclear power unit provided by the invention, the structure is simple, the product quality conforms to precision requirements of the steam generator in a nuclear power plant about the anti-vibration strip, and the anti-vibration strip component is safer to use. According to the preparation method of the anti-vibration strip, through strict preparation steps, the technique requirements about the anti-vibration strip component of the steam generator in the nuclear power plant are ensured, the quality is ensured, and safety is improved.
Description
Technical field
The present invention relates to a kind of antivibration bar assembly of AP1000 nuclear power generating sets steam generator.
Background technology
U-shaped heat transfer tube in the nuclear power station is that most critical also is the weakest link in the circuit system pressure boundary.In case heat-transfer pipe flutter failure must be changed steam generator, this certainly will cause the huge waste of manpower, financial resources and incident, has also increased the danger that the maintainer receives radioactivity irradiation.Therefore, solving the broken event of running affairs of steam generator is to be related to the security of nuclear power station and to make nuclear power station have the key issue of competitiveness and vitality.
To eliminate the root that vibration produces as far as possible; Generally need in steam generator, install the antivibration bar additional in the elbow of U-shaped heat-transfer pipe; How to provide a kind of resistance to shock good antivibration bar assembly, and the preparation method convenient and simple, that precision is high, be the technical barrier of this area.
Summary of the invention
The technical problem that the present invention will solve provides the antivibration bar assembly of the good AP1000 nuclear power generating sets steam generator of a kind of resistance to shock.
The antivibration bar assembly of AP1000 unit steam generator of the present invention, it comprises: the antivibration bar of V-shape structure and respectively fixed cover be located at two end caps at antivibration bar two ends.
Said antivibration bar is selected 405 stainless steel materials for use; Said end cap is selected 690 nickel-bass alloy materials for use, and the U type heat transfer tube in the unit steam generator also is a nickel-bass alloy material, and the two material is identical, can be conveniently that U type heat transfer tube and the welding of said end cap is fixing.690 nickel-bass alloy materials have the strong characteristics of corrosion resistance simultaneously.
Said end cap upsetting pressure is fixed on the said antivibration bar, prevents that end cap from occurring pulling in the assembling of antivibration bar assembly and said U type pipe, welding process.During practical implementation, the central authorities of said end cap and the part flattening that on the antivibration bar, is close to the end cap two ends.
A kind of preparation method of said antivibration bar assembly in turn includes the following steps:
A, antivibration bar bar bent the operation of moulding: with antivibration bar bar on request the size length overall add the 50mm allowance and cut off, set angle bends the antivibration bar, the antivibration bar after bending places on the surface grinding machine, and the bent angle buildup area is carried out reconditioning;
The operation of B, end cap assembling: end cap dabbed with alcohol wash the end cap surface and cut endoporus, with alcohol stainless steel bars is cleaned simultaneously with line, after cleaning up, deburring, bite mark, protrusion metal or wedge angle; Again the end of stainless steel bar is inserted in the endoporus of cap end.
The operation of C, upsetting pressure: (1) pulling-out force procedure qualification: the end cap to after assembling completion and carrying out upsetting pressure carries out the pulling-out force evaluation, makes cap bag under lowest pull, and the position is not moved; End pulling-out force under different pressures is carried out record, chooses only pressure, as the pressure process parameter in the upsetting pressure operation; (2) upsetting pressure: put into the upsetting pressure mould to the cap end, respectively upsetting pressure carried out in the position at the middle position of end cap and the contiguous end cap two ends on the antivibration bar with hydraulic press, depress keep-uped pressure 10 seconds behind the location after off-load.Upsetting pressure position on the antivibration bar has everywhere, and each two place, contiguous end cap end are used for the cap end is carried out spacing, prevent that end cap is subjected to displacement on the antivibration bar.
The preparation method of said antivibration bar bar in turn includes the following steps:
A, induction furnace smelt: place nickel plate, pure iron, crome metal in the induction furnace bottom when alloy material is smelted, and load in mixture closely knit, after the fusing 70%; 2% the slag charge that adds the weight that always feeds intake is made steel; Record molten steel temperature and reach after the tapping temperature to fall down molten steel in the ladle, pour into the steel ingot bar after calm 1-2 minute, improved degree of purity, the structural homogenity of steel alloy effectively; Improve surface, the inherent quality of steel ingot, improved the performance of steel alloy.
Antivibration bar alloy material requires pure; Chemical composition accurately, evenly; And the structural state of appointment arranged.Adopt induction furnace to have a series of unarguable advantages.Because it does not have existing pollution sources in other equipment, can guarantee to obtain the purest metal material concerning carbon and other impurity; Thereby stir the uniformity that metal bath guarantees alloy owing to have electric power; Assurance obtains exactly and keeps the needed temperature of metal and temperature is evenly distributed along whole bath temperature; Eliminate hot-spot; Because its thawing speed is fast, iron loss is few, thereby for obtaining the regulation alloying component accurately, minimum melting loss of elements creates favorable conditions; It had very high mobility when refinery was learned composition and forehearth different metallic changing.
B, forging: the alloy material steel ingot after will smelting through induction furnace forges into the steel billet of 50*50mm size after 1150-1220 ℃ of heating and insulation; Through delivering to down step hot rolling blank operation after the surface finish reconditioning.
Forging is that a kind of metal forming machinery that utilizes is exerted pressure to metal stock; Make it produce plastic deformation to obtain to have the processing method of certain mechanical performance, definite shape and size forging; Can eliminate defectives such as as cast condition that metal produces is loose through forging in smelting process; Optimize heterogeneous microstructure, owing to preserved complete metal streamline, the mechanical performance of forging generally is superior to the foundry goods of same material simultaneously.The strength member that load is high in the associated mechanical, condition of work is severe except that the better simply available rolling sheet material of shape, section bar or weldment, adopts forging more.In general forging is that the first step that belongs to materials processing is called " cogging "
C, hot rolling: with antivibration bar alloy material 50 * 50mm blank, carry out hot rolling after placing under the 1050-1100 ℃ of temperature heating, insulation, be rolled into the bar of ф 16mm.
Antivibration bar alloy material becomes the steel of the various geometric cross section shapes that 50 * 50mm blank rolls into blank with the mode of heating through hammer cogging.Different according to the sectional shape shape, be divided into simple section, compound section or three kinds of shaped steel such as special-shaped section and die rolled section.
(1) hot rolling can significantly cut down the consumption of energy, and reduces cost.Plastic deformation is high during hot rolling, and resistance of deformation is low, has significantly reduced the energy consumption of flow of metal.
(2) hot rolling can improve the process industrial art performance of metal and alloy, and the coarse grain that is about to as-cast condition is broken, and significantly crack healing reduces or eliminates casting flaw, with the Deformation structure that as-cast structure changes refinement into, improves the processing characteristics of alloy.
(3) the hot rolling big ingot casting of antivibration bar alloy material through adopting, heavy reduction rolling has not only improved production efficiency, and is that condition has been created in serialization and the automation that improves mill speed, the realization operation of rolling.
(4) manufacturing procedure was the essential step that forms the finished product blank in the middle of in fact hot-rolled process belonged to.
D, first heat treatment (annealing heat treatment): handle for the surface quality that the guarantees antivibration bar alloy material bar after to hot rolling carries out carrying out vacuum annealing after surface finish, the reconditioning once more, φ 16 antivibration bar alloy material bars heat, are incubated under 800 ℃ ± 10 ℃ of temperature.
Annealing heat treatment is divided into full annealing, partial annealing and stress relief annealing.The mechanical property of annealed material can detect with tension test, also can detect with hardness test.Intermediate heat-treatment is named heat treatment in advance again, is for the defective of eliminating one procedure or makes the back operation process the heat treatment that is provided with well.Be that metal slowly is heated to uniform temperature, keep the enough time, a kind of metal heat treatmet technology of cooling off with Reasonable Speed then.
The purpose of annealing
1. improve or eliminate various tissue defects and the residual stress that iron and steel is caused in casting, forging and pressing, rolling and welding process, prevent workpiece deformation, cracking.
2. softening workpiece is so that carry out cut.
3. crystal grain thinning improves tissue to improve the mechanical performance of workpiece.
4. for performing tissue, final heat treatment (quenching, tempering) prepares.
E, cold-drawn: carry out soft annealing earlier and handle, insulation is 40 minutes under 720-750 ℃ of temperature; Press deformation requirements with glomerocryst mould drawing successively, and the crizzle place is carried out reconditioning, can descend the road drawing behind reconditioning to the zero defect.
Cold-drawn is that the antivibration bar alloy bar after the hot rolling processing is reprocessed at cold state after soft annealing, to obtain the production method of all kinds of precisions, high accuracy product or intermediate products.
F, second heat treatment: antivibration bar alloy bar is pulled to finished-product material is tiled in the bell-jar heat-treatment furnace, under the hydrogen shield state, heat-treat, temperature is 788-815 ℃ between the annealing soak, and insulation is more than 3 hours; To be no more than below 28 ℃ of/hour cooling velocity slow cooling to 610 ℃, air cooling is to room temperature more then.
Metal heat treatmet is one of important process in the machine-building; Compare with other processing technologys; Heat treatment does not generally change the shape and whole chemical composition of workpiece; But through changing the microscopic structure of interior, or change the chemical composition of surface of the work, give or improve the serviceability of workpiece.Be characterized in improving the inherent quality of workpiece, and this generally not to be naked eyes can see.
For making metal works have needed mechanical property, physical property and chemical property, except that reasonable the selection of material and various forming technology, Technology for Heating Processing is requisite often.Iron and steel is to use the widest material in the mechanical industry, and microstructure of iron and steel is complicated, can control through heat treatment, so the heat treatment of iron and steel is the main contents of metal heat treatmet.In addition, aluminium, copper, magnesium, titanium etc. and alloy thereof also can change its mechanics, physics and chemical property through heat treatment, to obtain different serviceabilities.
G, finished product processing: the bar to after handling is aligned, is polished.
The rectification that the shape defect of Metal Forming product is carried out; It is one of important finishing procedure; Cold-drawn material produces the various shapes defective through regular meeting in production process or cooling afterwards and transportation; Such as the bending of section bar tubing, wave, wooden dipper song etc., can make defective such as bending be able under external force eliminate through various equipment for straightening, make product reach qualified perfect condition.
(1) corase grind: the polishing of product except to make smooth surface smooth, the more important thing is and should reduce top layer damage as far as possible.The deformation layer (deformation layer that one procedure produces before should making at least reduces to the deformation layer degree of depth that this procedure produces) that one procedure caused before each road polishing operation must be removed, rather than only remove the polishing scratch of preceding one procedure; Simultaneously, this procedure itself should accomplish to reduce as far as possible damage, so that carry out next process.The deformation layer degree of depth that last one branner's preface produces should be very shallow, guarantees in following one polishing process, to remove.This process will notice preventing that metal from too generating heat.
(2) correct grinding: the purpose of correct grinding is the darker polishing scratch that stays when eliminating corase grind, for next step polishing is laid a solid foundation.Correct grinding normally carries out on sand paper, and sand paper divides waterproof abrasive paper and abrasive paper for metallograph.Usually waterproof abrasive paper is that the SiC abrasive material is water insoluble, and the abrasive material of abrasive paper for metallograph has Alundum, carborundum, iron oxide etc., and property is all extremely hard; Be polygon corner angle; Have good cutting ability, available water is carried out manual wet-milling or mechanical wet-milling as lubricant during correct grinding, uses usually that granularity is 240,320,400,600 4 kind of waterproof abrasive paper can polish after polishing; For than the soft metal, use and polish again after thinner abrasive paper for metallograph polishes.Sand paper downward-sloping outwardly (seeing from operator's direction) sticks on when grinding on the plate glass, and the sample flour milling is put down the back on sand paper; Straight line pushes away forward and leaves sand paper when returning, and thisly carries out repeatedly, all disappears up to old polishing scratch; On whole flour milling, obtain the consistent uniformly new polishing scratch limit of direction and end, whenever change before one sand paper, must first water flush away sample and sand grains on hand; And dry, then the sample half-twist is ground on secondary sand paper.The water that flows during use ceaselessly flows through from coated abrasive surface, washes away most abrasive dusts and the abrasive particle that comes off in time.In whole polishing operation process, the sharp corners of abrasive particle contacts with the surface of sample all the time like this, keeps its good grinding effect.Another advantage of wet grinding is that the frictional heat that produces at specimen surface when the cooling effect of water can reduce polishing avoids microscopic structure to change.Whole polishing operation can be accomplished on equipment.
The preparation method of said end cap in turn includes the following steps: induction furnace smelting, forging, hot rolling, heat treatment, end cap Vehicle Processing; (needing to replenish effect, purpose or the technique effect of each operation)
Said induction furnace is smelted: place nickel plate, pure iron, crome metal in the induction furnace bottom when alloy material is smelted; And load in mixture closely knit; After the fusing 70%; 2% the slag charge that adds the weight that always feeds intake is made steel, and records molten steel temperature and reaches after the tapping temperature to fall down molten steel in the ladle, pours into steel ingot after calm 1-2 minute.
Antivibration bar alloy material requires pure; Chemical composition accurately, evenly; And the structural state of appointment arranged.Adopt induction furnace to have a series of unarguable advantages.Because it does not have existing pollution sources in other equipment, can guarantee to obtain the purest metal material concerning carbon and other impurity; Thereby stir the uniformity that metal bath guarantees alloy owing to have electric power; Assurance obtains exactly and keeps the needed temperature of metal and temperature is evenly distributed along whole bath temperature; Eliminate hot-spot; Because its thawing speed is fast, iron loss is few, thereby for obtaining the regulation alloying component accurately, minimum melting loss of elements creates favorable conditions; It had very high mobility when refinery was learned composition and forehearth different metallic changing.
Said forging: the steel ingot of the antivibration bar alloy material after will smelting through induction furnace forges into the steel billet of 50*50mm size after 1150-1220 ℃ of heating and insulation; Through delivering to down step hot rolling blank operation
after the surface finish reconditioning.
Forging is that a kind of metal forming machinery that utilizes is exerted pressure to metal stock; Make it produce plastic deformation to obtain to have the processing method of certain mechanical performance, definite shape and size forging; Can eliminate defectives such as as cast condition that metal produces is loose through forging in smelting process; Optimize heterogeneous microstructure, owing to preserved complete metal streamline, the mechanical performance of forging generally is superior to the foundry goods of same material simultaneously.The strength member that load is high in the associated mechanical, condition of work is severe except that the better simply available rolling sheet material of shape, section bar or weldment, adopts forging more.In general forging is that the first step that belongs to materials processing is called " cogging "
Said hot rolling: with antivibration bar alloy material 50 * 50mm blank, carry out hot rolling after placing under 1200 ± 10 ℃ of temperature heating, insulation, be rolled into the bar of ф 13 * 25mm.
Antivibration bar alloy material becomes the steel of the various geometric cross section shapes that 50 * 50mm blank rolls into blank with the mode of heating through hammer cogging.Different according to the sectional shape shape, be divided into simple section, compound section or three kinds of shaped steel such as special-shaped section and die rolled section.
(1) hot rolling can significantly cut down the consumption of energy, and reduces cost.Plastic deformation is high during hot rolling, and resistance of deformation is low, has significantly reduced the energy consumption of flow of metal.
(2) hot rolling can improve the process industrial art performance of metal and alloy, and the coarse grain that is about to as-cast condition is broken, and significantly crack healing reduces or eliminates casting flaw, with the Deformation structure that as-cast structure changes refinement into, improves the processing characteristics of alloy.
(3) the hot rolling big ingot casting of antivibration bar alloy material through adopting, heavy reduction rolling has not only improved production efficiency, and is that condition has been created in serialization and the automation that improves mill speed, the realization operation of rolling.
(4) manufacturing procedure was the essential step that forms the finished product blank in the middle of in fact hot-rolled process belonged to.
Said heat treated priority comprises: (1) solution treatment: the end cap material 13*25mm material after the hot rolling is tiled in solution treatment in the bell hydrogen resistance furnace gas shiled stove; (2) Ageing Treatment: also place the hydrogen shield stove to carry out Ageing Treatment the bar after the solution treatment.
Solution treatment is to equate to obtain uniform supersaturated solid solution in order to dissolve carbide in the matrix, γ '; Again separate out when being convenient to timeliness that particle is tiny, hardening constituent such as the carbide that is evenly distributed and γ '; Eliminate simultaneously because the stress that cold and hot working produces makes alloy that crystallization again take place.Secondly, solution treatment is for the grain size that obtains to suit, to guarantee the alloy high-temp creep-resistant property.The temperature range of solution treatment between 980 ~ 1250 ℃, is mainly selected according to separating out mutually in each alloy with dissolution law and instructions for use greatly, to guarantee the condition of separating out that main hardening constituent is necessary and certain grain size.For the alloy that long term high temperature uses, requiring has high-temperature and durable and croop property preferably, should select higher solid solubility temperature to obtain bigger grain size; Use and require the alloy of room temperature hardness, yield strength, hot strength, impact flexibility and fatigue strength preferably for middle temperature, can adopt lower solid solubility temperature, guarantee less grain size.When high temperature solid solution was handled, various precipitated phases are progressively dissolving all, simultaneously grain growth; During the low temperature solution treatment, the dissolving of main hardening constituent is arranged not only, and have separating out of some phase.For the low alloy of degree of supersaturation, select cooling velocity faster usually; For the high alloy of degree of supersaturation, be generally in the air and cool off.
Ageing Treatment: refer to alloy workpiece through solution treatment, cold plastic deformation or casting after the forging, are placed or its performance of room temperature maintenance shape, the Technology for Heating Processing of size time to time change in higher temperature.If adopt workpiece is heated to higher temperature, and the short period carry out the aging treatment process of Ageing Treatment, be called artificial aging and handle, if workpiece is placed on long storage time under room temperature or the natural conditions and the aging phenomenon that takes place, be called natural aging treatment.The third mode be oscillating aging from the eighties from the beginning of progressively getting into the practical stage; Oscillating aging is handled then and not to be heated also unlike natrual ageing under such time-consuming situation; Use the vibration that applies certain frequency to work that its internal stress is released, thereby reach the purpose of timeliness.The purpose of Ageing Treatment, the internal stress of elimination workpiece, stabilizing tissue and size are improved mechanical performance etc.
In machinery production,, often foundry goods is at room temperature placed for a long time, just carry out cut then in order to stablize casting dimension.This measure also is called as timeliness.But this timeliness does not belong to metal heat treatmet technology.
Said end cap Vehicle Processing: the 13*25mm material to after the Ageing Treatment machines, and is processed into the end cap of required size.
Technique effect of the present invention: the antivibration bar assembly of AP1000 unit steam generator of the present invention, simple in structure, product quality meets in the nuclear power station steam generator to the accurate requirement of antivibration bar, and is safer during use.The preparation method of this antivibration bar through strict preparation section, has guaranteed in the nuclear power station technological requirement of the antivibration bar assembly of steam generator has been guaranteed quality, has improved security.Said end cap upsetting pressure is fixed on the said antivibration bar, prevents that end cap from occurring pulling in the assembling of antivibration bar assembly and said U type pipe, welding process.During practical implementation, the central authorities of said end cap and the part flattening that on the antivibration bar, is close to the end cap two ends.
Description of drawings
Fig. 1 is the structural representation of the antivibration bar assembly of AP1000 unit steam generator of the present invention, Reference numeral: 1--antivibration bar, 2--end cap.
The specific embodiment
Embodiment 1
Like Fig. 1, the antivibration bar assembly of the AP1000 unit steam generator of present embodiment, it comprises: the antivibration bar 1 of V-shape structure and respectively fixed cover be located at two end caps 2 at antivibration bar two ends.
Said antivibration bar 1 is selected 405 stainless steel materials (SA-479 TYPE405) for use; Said end cap 2 is selected 690 nickel-bass alloy materials (SB-166 UNS N06690) for use.
Being crushed everywhere of contiguous end cap two ends on the central authorities of said end cap 2 and the antivibration bar 1.Two flattenings place that on antivibration bar 1, are in the end cap end are symmetrically distributed.
The preparation method of above-mentioned antivibration bar assembly comprises: the preparation of antivibration bar bar, the preparation of end cap, antivibration bar bar bend operations such as moulding, end cap assembling, upsetting pressure, inspection, cleaning and packing.
Described antivibration bar bar bends moulding: with antivibration bar bar on request the size length overall add the 50mm allowance and cut off, set angle bends the antivibration bar, the antivibration bar after bending places on the surface grinding machine, and the bent angle buildup area is carried out reconditioning to drawing requirement.
Described end cap assembling: end cap is dabbed the endoporus of washing end cap surface and line excision forming with alcohol, with alcohol stainless steel bars is cleaned simultaneously, after cleaning up, deburring, bite mark, protrusion metal or wedge angle; Again stainless steel bar is inserted the cap end, alignment angle is assembled.
Described upsetting pressure comprises: (1) pulling-out force procedure qualification: the end cap to after assembling completion and carrying out upsetting pressure carries out the pulling-out force evaluation, makes cap bag under the pulling force of minimum 4448N, and the position is not moved; End pulling-out force under different pressures is carried out record, chooses only pressure, as the pressure process parameter in the upsetting pressure operation; (2) upsetting pressure: put into the upsetting pressure mould to the cap end, respectively upsetting pressure carried out in the position at the middle position of end cap and the contiguous end cap two ends on the antivibration bar with hydraulic press, depress keep-uped pressure 10 seconds behind the location after off-load, guarantee to satisfy drawing requirement after the upsetting pressure of cap end.Upsetting pressure position on the antivibration bar has everywhere, and each two place, contiguous end cap end are used for the cap end is carried out spacing, prevent that end cap is subjected to displacement on the antivibration bar.
Said inspection: (1) flatness detects, and on detection platform, measures with clearance gauge; (2) size detection is used the digimatic micrometer measurement products; (3) angular detection is measured with the digital display angel measuring instrument; (4) visual detection is carried out visual detection to workpiece by part, guarantees surperficial zero defect, and surface roughness is with the roughness measuring instrument measurement of creeping; (5) surface finish measurement is measured with roughness instrument or comparison sample piece; All size detection results should meet drawing requirement.
Said cleaning: bar is cleaned by relevant regulations; Guarantee that finished surface does not have rust staining, dust and other pollutants; (1) sulphur, lead, mercury, cadmium and other low-melting metals; And their alloy and compound, halogen-containing material all forbids being used for the processes such as preparation, test, check and packing of antivibration bar; (2) lubricant, smear metal liquid and cleaning agent do not contain above-mentioned substance yet; Molykote, politef and other gather the fluorine material and also ban use of.
The preparation method of the antivibration bar bar in the foregoing description 1 comprises following operation successively: induction furnace smelting, heat analysis, forging, hot rolling, first heat treatment, performance test (stretching, hardness) and metal lographic examination, product analysis, cold-drawn, second heat treatment, finished product processing, performance test (stretching, hardness) and grain size check, dimension control, mark, cleaning.
Described induction furnace is smelted: place nickel plate, pure iron, crome metal in the induction furnace bottom when alloy material is smelted; And load in mixture closely knit; After the fusing 70%; 2% the slag charge that adds the weight that always feeds intake is made steel, and records molten steel temperature and reaches after the tapping temperature to fall down molten steel in the ladle, pours into the steel ingot bar after calm 1-2 minute.Every 40-50kg of steel ingot weight, steel ingot diameter microcephaly 140mm, major part 155mm.
Described heat analysis comprises: (1) sampling: apart from car beyond the head of ingot, ingot tail 20mm scope or dig sample for chemical analysis; (2) each heat (batch) number is got the chemical analysis that a sample for chemical analysis is measured every stove steel, and screen by the content standard data.The melting chemical analysis should meet following table and require:
| The trade mark | C | Mn | P | S | Si | Cr | Ni | Fe | Al |
| 405 | ≤0.08 | ≤1.00 | ≤0.040 | ≤0.030 | ≤1.00 | 11.5 ~ 14.5 | ≤0.60 | Surplus | 0.10-0.30 |
Described forging: the steel ingot that will analyze after qualified forges into the steel billet of 50*50mm size under 1150-1220 ℃;
(1) Forge Heating thermometer:
(2) forge: forging compression ratio is: 4-6; Forge size: 50*50mm; More than the square billet major part excision 100mm, the microcephaly excises more than the 50mm; The forging stock surface treatment: the reconditioning that strips off the skin of forging stock surface, remove blemish such as surperficial wrinkle crackle pipe.
Described hot rolling: steel billet placed under the 1050-1100 ℃ of temperature carry out hot rolling, be rolled into the bar of ф 16mm, will be after the hot rolling cooling, fold, scab, be mingled with by the crackle of root check surface quality, and thoroughly polishing is clean;
(1) the billet heating temperature table is following:
(2) rolling: the adjustment worker wants straight to the outward appearance of rolled products, is rolled into the silk material of ф 16mm; Will pursue root after the milling material cooling and check the crackle of surface quality, fold, scab, be mingled with, and thoroughly polishing is clean; Rolling ratio: >=5.
Described first heat treatment: the bar after the hot rolling is carried out vacuum annealing handle, temperature remains on 800 ± 10 ℃;
Described performance test comprises: (1) is appointed each stove lot number of the hot rolled rod after the heat treatment and is got one group of sample; (2) sample is carried out tension test, hardness test, Metallographic Analysis and product analysis respectively, substandard product is got rid of;
1. stretch test result should meet the following table requirement:
| Performance | Room temperature | 350 ℃ |
| Prescribed strength Rp0.2 (Mpa) | >=170 | >=145 |
| Tensile strength Rm (Mpa) | >=415 | >=370 |
| Elongation after fracture A (%) | >=20 | Info |
| Contraction percentage of area Z (%) | >=45 | Info |
When bar≤25mm, the longitudinal axis of sample is consistent with the center of bar, and the useful part of sample must not be less than the diameter of bar apart from the distance of bar heat treated end.
2. hardness test should meet:
| Performance | Room temperature |
| Hardness (HB) | ≤207 |
Hardness test should be in the hardness of the middle part of bar center to face check bar.
3. Metallographic Analysis should meet:
4. product analysis: do the material product analysis in the sampling of the two ends of tensile sample, analysis result should meet:
5. retrial and heat treatment again:
5.1 if the stretch test result of bar is undesirable, can cut two additional samples at the contiguous position of failed test sample and carry out tension test, only, two additional specimen test results can check and accept when all meeting the demands;
If cause mechanical property defective 5.2 any a collection of bar heat treatment is improper, then can be to this batch of material heat treatment again, but heat treated again number of times should be above twice; Again after the heat treatment, this batch of material is carried out all checks (removing the check of chemical analysis and non-metallic inclusion) of technical conditions regulation; All checks all should meet the requirement of present technique condition.
Described cold-drawn comprises: (1) is carried out the soft annealing processing earlier, and insulation is 40 minutes under 720-750 ℃ of temperature; (2) press deformation requirements with glomerocryst mould drawing successively, and the crizzle place is carried out reconditioning, can descend the road drawing behind reconditioning to the zero defect.
Drawing deflection during cold-drawn is φ 16 → φ 14 → φ 12.5 → φ 11 → 4.8 * 12.8 → 4.4 * 12.5 → 4.028 * 12.19.
It is following that system is handled in soft annealing:
| Steel grade | Specification | Heating-up temperature ℃ | Temperature retention time (branch) | The type of cooling |
| SA-479 TYPE405 | Before each cold-drawn | 720-750 ℃ | >=40 | Air cooling |
Described second heat treatment: will be pulled to finished-product material and be tiled in the bell-jar heat-treatment furnace, and under the hydrogen shield state, heat-treat, the annealing holding temperature is 788-815 ℃, and heat treatment temperature and other require the according to the form below requirement to carry out:
Described finished product processing: cold working operations such as the bar to after the heat treatment is aligned, polishing, the thickness after the processing, width, torsion resistance, linearity equidimension should meet following table and require:
Described performance test: bar is carried out mechanical property test, hardness test, grain size check, and the bar that requires is got rid of to not meeting the specification.
1. mechanical property test should meet:
| Performance | Room temperature |
| Prescribed strength Rp0.2 (Mpa) | 240-550 |
| Tensile strength Rm (Mpa) | 415-585 |
| Elongation after fracture A (%) | >=15 |
2. hardness test should meet:
| Performance | Room temperature |
| Hardness | HB≤207 or HRB≤93 |
3. grain size check:
| The method of inspection | Grade requirement |
| ASTM E112 | 5 grades or thinner |
If the mechanical property of bar does not meet specification requirement, then can carry out retrial, the retrial result requirement that all should meet the specification in the contiguous double sampling in position of this sample.
Described dimension control comprises: (1) visual examination: the Zhi Jinhang visual inspection is pursued on every material surface; Require defectives such as flawless, scuffing; Bar does not allow to carry out any repair by welding; And its surface roughness is pursued Zhi Jinhang check, need increase inspection to suspicious district, record the result and answer Ra≤1.6 μ m; (2) dimensional gaughing: take out 5% material and carry out dimensional gaughing, guarantee that scantling satisfies the tolerance of 4.028 ± 0.013* (12.19).
Described mark: on every material, should accurately make the sign or tie on a label, write maker's name exactly, material trademark and specification; Hearth number, lot number and piece number; Contract number or order number.
Described cleaning: by relevant regulations bar is cleaned, guarantee that finished product bar surface does not have rust staining, dust and other pollutants; Rod iron can not contact the material that itself and integrality is had harm.The incompatibility material of main metal has lead, zinc, copper, aluminium, cadmium, tin, mercury, sulphur, arsenic, boron and general low-melting alloy and their compound thereof; In addition; The fluoride, sulfate, chloride and the acid chloride that produce owing to the degraded of plastic containing chlorine are a potential danger, answer careful selection adhesive tape, marking pen, couplant, bleeding agent and coating; If the use milling tools, it is contaminated to guarantee that at first milling tools does not have.
Embodiment 3
The preparation method of the end cap in the foregoing description 1 comprises following operation successively: induction furnace smelting, electroslag refining, heat analysis, forging, ultrasonic examination, hot rolling, heat treatment, performance test, product analysis, end cap Vehicle Processing, dimension control, mark, cleaning.
Described induction furnace is smelted: place nickel plate, pure iron, crome metal in the induction furnace bottom when alloy material is smelted, and load in mixture closely knit, after the fusing 70%; Adding 2% the slag charge always feed intake makes steel; Record molten steel temperature and reach after the tapping temperature to fall down molten steel in the ladle, pour into the steel ingot bar after calm 1-2 minute, every 40-50kg of steel ingot weight; Steel ingot diameter microcephaly 140mm, major part 155mm.
Described electroslag refining: alloy material will pass through degree of purity, structural homogenity that electroslag refining could improve steel alloy effectively through after smelting, and improves surface, the inherent quality of steel ingot, improves the performance of steel alloy.When electroslag refining finishes, carry out feeding, after feeding 3-5 minute, cool off and took off ingot in >=3 minutes.Carry out the ESR ingot surface treatment then: the surface strips off the skin, reconditioning.
Described heat analysis comprises: (1) sampling: apart from car beyond the head of ingot, ingot tail 20mm scope or dig sample for chemical analysis; (2) each heat (batch) number is got a sample for chemical analysis; Test method by " ASTM E38 nickel-chromium and nickel-chromium-ferro alloy chemical analysis method " requirement is carried out the chemical analysis analysis to material; And screen by the content standard data, the melting chemistry should meet:
| Element | Composition limit % | Element | Composition limit % | Element | Composition limit % | Element | Composition limit % |
| Ni | 58.0min | Cr | 27.0-31.0 | Fe | 7.0-11.0 | Mn | 0.5max |
| Si | 0.5 max | C | 0.015-0.030 | Al | 0.50 max | Ti | 0.50 max |
| B | 0.005 max | N | 0.05 max | S | 0.010 max | P | 0.015 max |
| Cu | 0.20 max | Nb | 0.10 max | Mo | 0.10 max | Co | 0.05 max |
| Mg | Info | Ta | Info |
Described forging: the steel ingot that will analyze after qualified forges into the steel billet of 50*50mm size under 1240-1260 ℃ of temperature.
1. will carry out annealing in process to steel ingot before forging, the heat treatment temperature according to the form below carries out:
2. deformation technique: forging compression ratio is: 4-6; More than the square billet major part excision 100mm, the microcephaly excises more than the 50mm; Forge square billet and be of a size of 50*50mm; The forging stock surface treatment: the reconditioning that strips off the skin of forging stock surface, remove blemish such as surperficial wrinkle crackle pipe.
Described ultrasonic examination: the square rod of the reconditioning that will strip off the skin carries out ultrasound examination by the detection method and the acceptance criteria of regulation in " bar Dynamic Non-Destruction Measurement condition ".
Described hot rolling: square billet placed under 1200 ℃ of left and right sides temperature carry out hot rolling; Be rolled into the material of 13*25mm; The hot-rolled temperature deviation is no more than 10 degree, will be after the hot rolling cooling, defective such as fold, scab, be mingled with by the crackle of root check surface quality, and thoroughly polishing is clean;
1. the square billet after forging carries out annealing in process earlier before hot rolling, annealing temperature such as following table:
2. rolling control: end cap is rolled into 13*25mm with material; Will be after the milling material cooling by root check face crack, defective such as fold, scab, be mingled with, and excision or thoroughly polishing is clean; Rolling ratio is >=5.
Described heat treatment comprises: 1. solution treatment: the end cap material 13*25mm material after the hot rolling is tiled in solution treatment in the bell hydrogen resistance furnace gas shiled stove, heat treatment temperature such as following table:
| Steel grade | Specification | Heating-up temperature ℃ | Temperature retention time (h) | The type of cooling |
| SB-166 UNS N06690 | 13*25mm | Concrete heat treatment temperature is following | >=1 | Air cooling |
| Phosphorus content wt.% | Minimum holding temperature ℃ |
| 0.015 | 1016 |
| 0.016 | 1023 |
| 0.017 | 1030 |
| 0.018 | 1036 |
| 0.019 | 1043 |
| 0.020 | 1049 |
| 0.021 | 1055 |
| 0.022 | 1060 |
| 0.023 | 1066 |
| 0.024 | 1071 |
| 0.025 | 1076 |
| 0.026 | 1081 |
| 0.027 | 1085 |
| 0.028 | 1090 |
| 0.029 | 1094 |
| 0.030 | 1099 |
Wherein, the holding temperature deviation be no more than ± 10 ℃.
2. Ageing Treatment: the bar after the solution treatment must carry out Ageing Treatment, and Ageing Treatment also should be carried out in the hydrogen shield stove, and heat treatment temperature is:
| Steel grade | Specification | Heating-up temperature ℃ | Temperature retention time (h) | The type of cooling |
| SB-166 UNS N06690 | 13*25mm | 704～732 ℃ | 8-12h | Air cooling |
Wherein, Ageing Treatment should be above ± 10 ℃ at the temperature deviation of soak.
3. solid solution and timeliness heat treatment record should be listed in the certificate of quality file, and the heat treatment record should comprise holding temperature and deviation, temperature retention time, the rate of heat addition, heating atmosphere and the type of cooling.
Described performance test comprises:
1. sampling: each stove lot number is appointed and is got an appearance and do mechanical property test, the longitudinal axis of tensile sample be parallel to bar axially.The useful part of tensile sample is at least one times of diameter of rod from the bar end; The residing position of the longitudinal axis of tensile sample is the bar center; Sample has enough length, so that all test consumptions and the required samples of possibility retrial such as intercepting hardness sample, metallographic specimens.
2. tension test should meet:
Wherein, the standard specimen of gauge length 50mm, diameter 12.5mm is adopted in tension test.
3. Metallographic Analysis: Metallographic Analysis is done in the sample close position sampling in tension test, and the Metallographic Analysis examination criteria is:
4. macro-erosion test: appoint one of extraction to carry out the macroetch test for every batch; Should make an experiment at crop cross section position at the two ends of bar; With the naked eye or by magnifying glass below 10 times evaluate, do not allow defectives such as shrinkage cavity, cavity, crackle, slag inclusion and pin hole.
5. Huey test: every batch of bar should be got one group of (two) sample and carry out Huey test on any bar after the Ageing Treatment; Sample is got in the stretching adjacent locations; Sample should be handled through sensitization earlier; Sensitization processing system be 675 ℃ ± 5 ℃ the insulation 1 hour, the sample corrosion rate should less than 20mdd (milligram/square decimeter. the sky).
6. product analysis: each stove is appointed and is got the product analysis that a sample is done material near tensile sample, and the product analysis result should meet:
| Element | Composition limit % | Element | Composition limit % | Element | Composition limit % | Element | Composition limit % |
| Ni | 58.0min | Cr | 27.0-31.0 | Fe | 7.0-11.0 | Mn | 0.5max |
| Si | 0.5 max | C | 0.015-0.030 | Al | 0.50 max | Ti | 0.50 max |
| B | 0.005 max | N | 0.05 max | S | 0.010 max | P | 0.015 max |
| Cu | 0.20 max | Nb | 0.10 max | Mo | 0.10 max | Co | 0.05 max |
| Mg | info | Ta | info | ? | ? | ? | ? |
Described end cap Vehicle Processing: the 13*25mm material to after the Ageing Treatment makes a service test, and qualified material is machined, and is processed into φ 22.86 ± 0.05 on request, long 50.8 ± 0.07 end cap product.
Described dimensional gaughing: 1, to every material surface by the Zhi Jinhang visual inspection, end cap does not allow indentation, burr, lobe, metal and heaves.2, material is carried out dimensional gaughing, the inspection quantity of every stove material should be greater than 5%.
Described mark: on every material, should accurately make the sign or tie on a label, should comprise: job number, material trademark and specification, bar piece number, hearth number, heat treatment heat (batch) number, bar maker's name.
Described cleaning: by relevant regulations bar is cleaned, guarantee that finished product end cap surface does not have rust staining, dust and other pollutants.
Claims (6)
1. the antivibration bar assembly of an AP1000 nuclear power generating sets steam generator is characterized in that comprising: the antivibration bar of V-shape structure and respectively fixed cover be located at the end cap at antivibration bar two ends.
2. the antivibration bar assembly of AP1000 nuclear power generating sets steam generator as claimed in claim 1 is characterized in that: said antivibration bar is selected 405 stainless steel materials for use; Said end cap is selected 690 nickel-bass alloy materials for use.
3. according to claim 1 or claim 2 the antivibration bar assembly of AP1000 nuclear power generating sets steam generator, it is characterized in that: said end cap upsetting pressure is fixed on the said antivibration bar.
4. an aforesaid right requires the preparation method of 2 described antivibration bar assemblies, it is characterized in that in turn including the following steps:
A, antivibration bar bar bent the operation of moulding: with antivibration bar bar on request the size length overall add the 50mm allowance and cut off, set angle bends the antivibration bar, the antivibration bar after bending places on the surface grinding machine, and the bent angle buildup area is carried out reconditioning;
The operation of B, end cap assembling: end cap dabbed with alcohol wash the end cap surface and cut endoporus, with alcohol stainless steel bars is cleaned simultaneously with line, after cleaning up, deburring, bite mark, protrusion metal or wedge angle; Again the end of stainless steel bar is inserted in the endoporus of cap end;
The operation of C, upsetting pressure: put into the upsetting pressure mould to the cap end, respectively four points at the middle position of end cap and the contiguous end cap two ends on the antivibration bar carried out upsetting pressure with hydraulic press, depress keep-uped pressure 10 seconds behind the location after off-load.
5. the preparation method of antivibration bar assembly according to claim 4 is characterized in that: the preparation method of said antivibration bar bar in turn includes the following steps:
A, induction furnace are smelted: place nickel plate, pure iron, crome metal in the induction furnace bottom when alloy material is smelted; And load in mixture closely knit; After the fusing 70%; 2% the slag charge that adds the weight that always feeds intake is made steel, and records molten steel temperature and reaches after the tapping temperature to fall down molten steel in the ladle, pours into the steel ingot bar after calm 1-2 minute;
B, forging: the alloy material steel ingot after will smelting through induction furnace forges into the steel billet of 50*50mm size after 1150-1220 ℃ of heating and insulation, and carries out the surface finish reconditioning;
C, hot rolling: with antivibration bar alloy material 50 * 50mm blank, carry out hot rolling after placing under the 1050-1100 ℃ of temperature heating, insulation, be rolled into the bar of ф 16mm;
D, first heat treatment: handle for the surface quality that the guarantees antivibration bar alloy material bar after to hot rolling carries out carrying out vacuum annealing after surface finish, the reconditioning once more, φ 16 antivibration bar alloy material bars heat, are incubated under 800 ℃ ± 10 ℃ of temperature;
E, cold-drawn: carry out soft annealing earlier and handle, insulation is 40 minutes under 720-750 ℃ of temperature; Press deformation requirements with glomerocryst mould drawing successively, and the crizzle place is carried out reconditioning, can descend the road drawing behind reconditioning to the zero defect;
F, second heat treatment: antivibration bar alloy bar is pulled to finished-product material is tiled in the bell-jar heat-treatment furnace, under the hydrogen shield state, heat-treat, temperature is 788-815 ℃ between the annealing soak, and insulation is more than 3 hours; To be no more than below 28 ℃ of/hour cooling velocity slow cooling to 610 ℃, air cooling is to room temperature more then;
G, finished product processing: the bar to after handling is aligned, is polished.
6. the manufacturing approach of antivibration bar assembly according to claim 4 is characterized in that: the preparation method of said end cap comprises following operation successively: induction furnace smelting, forging, hot rolling, heat treatment, end cap Vehicle Processing;
Said induction furnace is smelted: put nickel plate, pure iron, crome metal in the induction furnace bottom when alloy material is smelted; And load in mixture closely knit; After the fusing 70%; 2% the slag charge that adds the weight that always feeds intake is made steel, and records molten steel temperature and reaches after the tapping temperature to fall down molten steel in the ladle, pours into steel ingot after calm 1-2 minute;
Said forging: the alloy material steel ingot after will smelting through induction furnace forges into the steel billet of 50*50mm size after 1150-1220 ℃ of heating and insulation, and carries out the surface finish reconditioning;
Said hot rolling: with antivibration bar alloy material 50 * 50mm blank, carry out hot rolling after placing under 1200 ± 10 ℃ of temperature heating, insulation, be rolled into the bar of ф 13 * 25mm;
Said heat treatment successively comprises: (1) solution treatment: the end cap material 13*25mm material after the hot rolling is tiled in solution treatment in the bell hydrogen resistance furnace gas shiled stove; (2) Ageing Treatment: also place the hydrogen shield stove to carry out Ageing Treatment the bar after the solution treatment;
Said end cap Vehicle Processing: the 13*25mm material to after the Ageing Treatment machines, and is processed into the end cap of required size.
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| CN201410189304.7A CN103921080B (en) | 2012-08-20 | 2012-08-20 | A kind of preparation method of nuclear power generating sets steam generator anti-vibration bar assembly |
| CN201410189525.4A CN103921083B (en) | 2012-08-20 | 2012-08-20 | Preparation method of the steam generator with antivibration bar assembly |
| CN201410189337.1A CN103934647B (en) | 2012-08-20 | 2012-08-20 | The preparation method of the anti-vibration bar assembly of steam generator |
| CN201410188659.4A CN103934644B (en) | 2012-08-20 | 2012-08-20 | The preparation method of the anti-vibration bar assembly of nuclear power generating sets steam generator |
| CN201410189522.0A CN103921082B (en) | 2012-08-20 | 2012-08-20 | A kind of preparation method of antivibration bar assembly |
| CN201410189617.2A CN103934649B (en) | 2012-08-20 | 2012-08-20 | The nuclear power generating sets steam generator preparation method of anti-vibration bar assembly |
| CN201210297066.2A CN102794608B (en) | 2012-08-20 | 2012-08-20 | Anti-vibration strip component of steam generator of AP1000 nuclear power unit |
| CN201410189524.XA CN103934648B (en) | 2012-08-20 | 2012-08-20 | The preparation method of the end cap in the antivibration bar assembly of nuclear power generating sets steam generator |
| CN201410189301.3A CN103921079B (en) | 2012-08-20 | 2012-08-20 | The preparation method of anti-vibration bar assembly |
| CN201410189303.2A CN103934646B (en) | 2012-08-20 | 2012-08-20 | A kind of preparation method of Shockproof strip assembly for steam generator of nuclear power unit |
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| CN201410188659.4A Division CN103934644B (en) | 2012-08-20 | 2012-08-20 | The preparation method of the anti-vibration bar assembly of nuclear power generating sets steam generator |
| CN201410189304.7A Division CN103921080B (en) | 2012-08-20 | 2012-08-20 | A kind of preparation method of nuclear power generating sets steam generator anti-vibration bar assembly |
| CN201410189337.1A Division CN103934647B (en) | 2012-08-20 | 2012-08-20 | The preparation method of the anti-vibration bar assembly of steam generator |
| CN201410189525.4A Division CN103921083B (en) | 2012-08-20 | 2012-08-20 | Preparation method of the steam generator with antivibration bar assembly |
| CN201410189522.0A Division CN103921082B (en) | 2012-08-20 | 2012-08-20 | A kind of preparation method of antivibration bar assembly |
| CN201410189301.3A Division CN103921079B (en) | 2012-08-20 | 2012-08-20 | The preparation method of anti-vibration bar assembly |
| CN201410189617.2A Division CN103934649B (en) | 2012-08-20 | 2012-08-20 | The nuclear power generating sets steam generator preparation method of anti-vibration bar assembly |
| CN201410189036.9A Division CN103934645B (en) | 2012-08-20 | 2012-08-20 | A kind of preparation method of the anti-vibration bar bar in anti-vibration bar assembly |
| CN201410189524.XA Division CN103934648B (en) | 2012-08-20 | 2012-08-20 | The preparation method of the end cap in the antivibration bar assembly of nuclear power generating sets steam generator |
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| CN201210297066.2A Expired - Fee Related CN102794608B (en) | 2012-08-20 | 2012-08-20 | Anti-vibration strip component of steam generator of AP1000 nuclear power unit |
| CN201410189524.XA Active CN103934648B (en) | 2012-08-20 | 2012-08-20 | The preparation method of the end cap in the antivibration bar assembly of nuclear power generating sets steam generator |
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Also Published As
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| CN103934648B (en) | 2016-05-04 |
| CN103934649A (en) | 2014-07-23 |
| CN102794608B (en) | 2014-04-02 |
| CN103934644A (en) | 2014-07-23 |
| CN103934648A (en) | 2014-07-23 |
| CN103934649B (en) | 2016-03-30 |
| CN103934644B (en) | 2016-03-30 |
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